Derrick



L. HENDERSON.

Patnted Oct. 5, 1920.

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all s @9R11 e so PATENT OFFICE.

LEE'HENDE-EsoN, 'or STANLEY, wiscoNsIN.

, DEERICK.

Specification of Letters Patent.

Patented Oct. v5, 1920.

YApplication filed March 22, 1920. serial No. 367,779.

To LZ-Z whom t may concern: n

Be it known that l, LEE HENDERSON, a citizen of the UnitedStates, residing at Stanley, in the county 'of Chippewa and State of Viisconsiii, have invented a new and useful Derrick, of which the following is a specification. Y y

'This invention relates to new and useful improvements in derricks, and more particularly to portable derricks to be employed for hoisting heavy articles into places remote from the ground surface'.

The primary object of the invention is to provide a device of this character which may be readily moved to an operative position, and one which may be set up for use in any location where the ground surface is packed suhiciently to properly support the same in its upright position.

A further object of the invention is to provide means adjacent the lower end of the supporting standard to prevent the standard from moving laterally under the weight of the article being lifted.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, maybe made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawing Figure 1 illustrates a side elevational view partly in section, of a derrick constructed in accordance with the present invention.

Fig. 2 illustrates a sectional view taken on line 2 2 of Fig. 1.

Referring to the drawing in detail, the invention is shown in its operative position, the standard 5, thereof, being properly positioned within the ground surface to support the same in an upright position.

This Standard 5, is relatively long, and is provided with the pointed end 6, constructed toV permit the standard 5 to be readily positioned within the ground surface, by pressure exerted on the upper end thereof. A laterally extending arm 7, has connection with the upper end of the standard 5, through the elbow 8, the outer, or free end of said arm 7 supporting the collar 9, which. substantially embraces the extreme end ofthe arm 7, and asshown is provided with the depending hook 10, providing a Support for the pulleys 11 and 12, the pulley 11 being provided with the upwardly extending connecting arms 13 apertured as at 14 to receive the link 15, which in turn is positioned over the depending hook 10.

The lower pulley 12, is also provided with `th'e arms 16, forming apart of the depending hook 17, which hook is adapted to directly engage the article or articles to be lifted, it being of course understood that suitable devices are added to the article, to enablethe hook member 17 to be secured thereto.

The flexible member 18, forming the operating means by which the articles to be lifted are moved from the surface on which the same are supported, has one of its ends permanently secured adjacent the upper pulley 11, the opposite end thereof extending downwardly to be grasped by the person operating the derrick, the central, or intermediate portion of the flexible member 18, operating over the pulleys 11 and 12, whereby movement of the flexible member 18, in one direction, as by a pull on the free end thereof, causes the pulley 12 to move toward the pulley 11, with the result that articles engaged by the hook 17, are raised to a position in close proximity with the pulley 11, where the same may be deposited.

A supporting tube 19. embraces the lower portion of the standard 5, to insure against the standard 5, tilting oi' leaning laterally, when the same is brought into operation, and as shown, this tube 19 has one of its ends positioned in the sleeve 20, formed on the plate 21, which is riveted, to the base plate 22,r as at 23, the base plate 22 being apertured as at 211, to permit the lower eX- tremity of the standard 5 to pass therethrough.

It is therefore obvious that lateral stra-in, brought to bear on the standard 5, during the lifting operation, is directed to the supporting tube 19, which in turn directs the pressure to the base plate 22, the same being substantially large to engage the ground surface around the standard 5, at points remote from the standard 5.

In order that the arm 7, will be properly supported at all times with relation to the standard 5, an angular brace rod 25 is provided, and connects the arm 7 and standard 5, the collars 26 and 27, embracing the reA `ticle is released from the hook 17.

spective members 5 and 7, which in turn vhave connection. with the bracev rod 25 through the mediumof the lpivot pin 28. Y

In the operation of the device, assuming that the pulley 12 is in a position as indicated by F 1 of the drawing, itis only necessary to slackenxthe flexible member' 18, which VYpermits the pulley 12 to descend to a pointwhere the same may be attached to the article to be lifted, whereupon the` flexible member 18 is pulled, by'windlass, or

manual power, with the result that the puli ley 12,`and the article supported thereby are hoisted to aproper position wherein the ar- I'Iaving thus described the invention, what is claimed is :4

" VIn a portable derrick, a base plate having Yappreciable distance above the upper end of the sleeve, a standard having a pointed exytremity, said standard adapted to be positioned within the tube, the pointed extremity thereoi` adapted'to extend below the base plate, and hoisting means. `disposed at the upper extremity of the standard.

In testimony that I claim the foregoing as my own, I have hereto aixedmy signature v.1n the presence of two witnesses.

LEEHENDEBsoN i Witnesses C. B. CULBER'rsoN, IMBERT ROE. 

